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TDES Encryption / Decryption

• Technology Overview
Triple Data Encryption Algorithm (TDEA) is a symmetric key algorithm. TDEA is designed to encrypt and decrypt blocks of data (multiple of 64 bits) using a 192-bits private key. Its security is based on the secure private key. TDEA is a compound operation of DES encryption and decryption operations. A TDEA key consists of three DES keys, which are also referred to as a key bundle.


• Product Features
• Compatible with "Data Encryption Standard (DES)", FIPS PUB46-3, Federal Information Processing Standards Publication, Reaffirmed, 1999 October 25.
• Supports ECB and CBC modes.
• APIs for key schedule, encryption and decryption.
• Flexible interface with 'C' callability.
• Easily portable to other architectures.
• The code is interruptible and fully re-entrant. It can be used in systems with multi threaded software architecture.


• Processor
• ARM-7TDMI with 8KB unified cache and 64 MHz clock.


• Performance
• Memory Requirements

ROM(Bytes)		RAM(Bytes)
Code	Table	Data	Stack
4244	4704	384	104

• Timings

Key Generation (usec)	Encryption (usec)	Decryption (usec)
112 - 136	132 - 136	92 - 96

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